Is there a way to find how many tags are using a particular scan class? So If I have a scan class (example location 4 = 2 which is set for 00:00:02) on the interface, is there a way (either through PI SMT or through the PI Interface to poll how many tags are using that particular scan class? I looked in the users manual but couldn't find the answer. Thanks!

Using ICU you can create interface health tags which contain number of points in each scan class. See "Scan class health points". Additionally, a scan class summary can be written to a tag of type string. This helps a lot and costs only one tag per scan class plus one tag per interface.